Related Experiment Videos
Chromosomal abnormalities in embryos derived from testicular sperm extraction
Sherman Silber1, Tomas Escudero, Kathleen Lenahan
1Infertility Center of St. Louis at St. Luke's Hospital, St. Louis, Missouri, USA.
Fertility and Sterility
|January 14, 2003
Summary
Embryos from testicular sperm extraction (TESE) show significantly higher mosaicism rates compared to those from ejaculated sperm in intracytoplasmic sperm injection (ICSI) cycles. This suggests TESE sperm may have compromised centrosome structures, impacting embryo development.
Area of Science:
- Reproductive Medicine
- Genetics
- Embryology
Background:
- Intracytoplasmic sperm injection (ICSI) is a key treatment for male infertility.
- Testicular sperm extraction (TESE) is used for nonobstructive azoospermia.
- Chromosome abnormalities in embryos can affect IVF success rates.
Purpose of the Study:
- To compare chromosome abnormality rates in embryos from TESE vs. ejaculated sperm.
- To investigate the impact of sperm source on embryo mosaicism.
- To evaluate embryo quality in ICSI cycles with different sperm retrieval methods.
Main Methods:
- Retrospective analysis of ICSI cycles from IVF centers.
- Sperm source: TESE for nonobstructive azoospermia vs. ejaculated sperm.
- Preimplantation genetic diagnosis (PGD) using fluorescence in situ hybridization (FISH) for chromosome enumeration.
Main Results:
- Embryos from ejaculated sperm: 41.8% normal, 26.2% aneuploid, 26.5% mosaic.
- Embryos from TESE: 22% normal, 17% aneuploid, 53% mosaic.
- Significantly higher mosaicism rate in embryos derived from TESE sperm.
Conclusions:
- High incidence of embryo mosaicism observed with TESE sperm in men with severe spermatogenesis deficits.
- TESE sperm may possess immature or compromised centrosome structures, leading to increased embryonic mosaicism.
- Further research is needed to understand the implications of TESE sperm on ART outcomes.